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Table 1.

Expanded stellar population of the Arches cluster

ID RA Dec mF127M mF139M mF153M mF205W #Observations Spectral Notes
(h m s) (d m s) (mag) (mag) (mag) (mag) (#Epochs) classification
F23 17 45 51.211 −28 49 23.84 16.38 15.27 14.21 12.19 6(6) O5.5-6 Ia
F39 17 45 51.166 −28 49 36.70 16.98 15.84 14.76 12.65 1(1) O5.5-6 Ia
F41 17 45 50.429 −28 49 27.42 18.46 17.15 15.89 13.53 4(4) O5 Ia
F44 17 45 50.701 −28 49 25.59 17.19 16.05 14.93 12.88 7(5) O5.5-6 Ia Close to 73
F48 17 45 50.623 −28 49 26.96 17.69 16.53 15.42 13.28 6(6) O5.5-6 Ia
F56 17 45 50.591 −28 49 22.19 17.00 15.92 14.91 13.03 2(2) O5.5-6 III Merged with F95
F57 17 45 50.768 −28 49 20.31 16.91 13.04 2(2) O5.5-6 III Merged with F72
F58 17 45 49.968 −28 49 19.60 17.83 16.57 15.37 13.05 3(3) O5.5-6 III
F65 17 45 50.082 −28 49 21.53 17.58 16.42 15.32 13.16 5(5) O5.5-6 Ia
F72 17 45 50.784 −28 49 20.27 16.08 15.05 13.13 2(2) O5.5-6 III Merged with F57
F73 17 45 50.679 −28 49 25.58 17.78 16.59 15.48 13.35 11(9) O6 III Close to F44
F80 17 45 50.589 −28 49 19.46 17.40 16.29 15.32 13.47 28(14) O6-6.5 III Close to F7
F83 17 45 50.061 −28 49 20.67 18.00 16.81 15.69 13.53 4(4) O6-7 III-V
F89 17 45 50.955 −28 49 17.15 17.33 16.33 15.39 13.65 16(15) O7-8 V
F94 17 45 50.657 −28 49 28.03 18.74 17.50 16.33 14.14 4(4) O6-8 III-V
F95 17 45 50.578 −28 49 22.00 17.80 16.71 15.69 13.71 2(2) O5.5-6 III Merged with F56
F98 17 45 51.153 −28 49 37.06 18.08 16.93 15.87 13.75 1(1) O6-6.5 III
F101 17 45 50.914 −28 49 18.37 17.55 16.53 15.58 13.78 19(16) O8 V
F102 17 45 50.876 −28 49 28.80 18.24 17.07 15.93 13.78 6(6) O5-6 V
F118 17 45 50.453 −28 49 25.97 18.66 17.44 16.28 14.08 8(6) O8-9.5 V
F119 17 45 50.842 −28 49 22.75 18.18 17.09 16.06 14.06 11(10) O8 V
F121 17 45 50.204 −28 49 19.64 18.53 17.35 16.24 14.09 9(9) O9.5 V
F128 17 45 51.216 −28 49 36.53 18.51 17.37 16.28 14.18 1(1) O9.5 V
F130 17 45 50.605 −28 49 27.50 18.80 17.58 16.40 14.21 4(4) O9.5 V
F131 17 45 50.163 −28 49 27.46 19.11 17.80 16.55 14.23 9(6) O6.5 III Close to F10 & 17
F136 17 45 50.077 −28 49 27.84 19.59 18.18 16.83 14.30 13(10) O6-7 V
F139 17 45 51.207 −28 49 23.41 18.59 17.48 16.33 14.36 6(6) O8 V
F142 17 45 50.689 −28 49 24.93 18.63 17.50 16.43 14.41 2(2) O8 V Close to F53
F157 17 45 50.220 −28 49 24.18 19.11 17.89 16.71 14.55 14(14) O8-9.5 V
F159 17 45 50.882 −28 49 15.69 19.63 18.49 17.32 14.57 6(6) O9.5 V
F170 17 45 50.704 −28 49 20.96 18.74 17.67 16.63 14.74 19(10) O8-9.5 V Close to F32, 33 & 38
F173 17 45 50.204 −28 49 20.24 19.10 17.93 16.83 14.80 5(5) O9.5 V
F185 17 45 50.282 −28 49 27.56 19.65 18.40 17.18 14.95 10(7) O9.5 V
F186 17 45 50.001 −28 49 28.24 20.43 19.01 17.61 14.95 13(10) O9.5 V
F188 17 45 50.936 −28 49 21.80 19.02 17.93 16.91 14.97 3(3) O9.5 V
F189 17 45 50.595 −28 49 23.52 18.91 17.79 16.69 14.77 5(5) O9.5 V

Notes.We summarise the properties of stars with new or revised spectral classifications. Column 1 indicates the nomenclature for cluster members adopted by Figer et al. (2002), Cols. 2 and 3 the J2000 co-ordinates, Cols. 4–6 the HST WFC3 photometry from Paper I and Col. 7 F205W filter photometry from Figer et al. (2002). Column 8 presents the total number of VLT/SINFONI data-cubes available for individual objects, with the number in parentheses being the number of epochs on which these data were obtained. Column 9 provides a spectral classification while the final column provides additional notes on possible blending or contamination; individual cases are discussed in Sect. 2. F36 is found to be a cool interloper; as with F11, F46, F51 and F99 it is therefore excluded from the table. Finally the nominal classification of the unresolvable blends F56+F95 and F57+72 are given in italics.

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